Rotatable connection with rotational angle limitation

ABSTRACT

A rotatable connection for a stand apparatus to be arranged in an operating room and including an adaptable stop mechanism which can be arranged between a first connection component and a second connection component mounted rotatably around a rotational axis relative to the first connection component and is configured to define at least two different relative rotational angles of the connection components or at least two different rotational ranges is provided. A carrier system or a stand apparatus having such a rotatable connection is also provided.

This is a divisional application from U.S. patent application Ser. No.14/695,372, filed Apr. 24, 2015, the disclosure of which is incorporatedherein by this reference.

The present invention relates to a rotatable connection of a standapparatus to be arranged in an operating room which comprises anadaptable stop mechanism, which can be arranged between a spindle and asleeve mounted rotatably around a rotational axis relative to thespindle and is configured to define at least two different relativerotational angles of the spindle relative to the sleeve or at least twodifferent rotational ranges, the adaptable stop mechanism comprising: afirst part, in particular in the form of an stop ring which can bemounted on the spindle such that it can be rotationally locked andcomprises at least a first stop; and a second part which is providednon-rotatably on the sleeve; the first part being rotatably mountedrelative to the second part. The present invention relates in particularto a rotatable connection with individual features as well as a carriersystem or a stand apparatus with individual features of the appropriatefurther independent claim.

Stands, in particular ceiling stands such as, for example, ceilingsupply units, monitor arms or so-called spring arms or central axes,usually have one or more carriers, which are height-adjustable orfixedly arranged in relation to a vertical position, by means of which amedical technology device fastened thereto can be moved and positioned,e.g. in an operating room, in particular also at an intensive carestation. Frequently mounted on the stands are supply units with whichmedical-electrical end-devices can be supplied, for example, with mediarequired during surgery. The carriers define an action radius of themedical technology device in which the medical technology device ispositioned. The carrier can usually be rotated at least around arotatable connection, in particular a rotational joint. The carrier canoptionally be arranged as height-adjustable and/or swiveled up and downaround an at least nearly horizontally oriented axis.

A rotational movement of individual parts, be it an absolute rotationalmovement or a rotational movement relative to another carrier, should belimited to a prescribed angle in many cases. This can prevent thecarrier from being rotated by more than 360° in relation to anothercarrier and thereby twisting, crushing or even tearing the lines routedin the carrier. Rotational angle limitation can be provided, forexample, in the form of a stop which a carrier strikes at a certainrotational angle, for example 300°. The stop can be fixedly mounted onthe carrier, for example, particularly in the form of a locking pinintroduced in the radial direction. The stop provides a predefinedrotational angle. While such a rotational angle limitation can ensurethat a maximum rotational angle is not exceeded, it usually also has thedisadvantage that it limits the freedom of movement of the stand, i.e.no longer allows a supply unit, for example, of the stand to be arrangedin the desired positions. The radius of action of the stand is limited,particularly without taking a particular spatial situation intoconsideration. It is therefore necessary to determine in each individualcase by what stop position the rotational angle limitation can or shouldbe defined. Properly determining rotational angle limitation, inparticular the adequate positioning of the stop, can, however, bedifficult even as early as the manufacturing of a particular stand,particularly if it has not been clarified where the stand is to be used.Rotational angle limitations that allow a rotational angle or rotationalposition to be subsequently adjusted are thus practical.

A device with an adjustable rotational angle is known from EP 2 325 541B1. EP 2 325 541 B1 describes a two-part adaptable stop mechanism inwhich a ring-shaped part can be selectively positioned externally arounda circumference of a first carrier or a joint of the first carrier, andthe ring-shaped part comprises a plurality of recesses or projectionsarranged on the end face which allow it to be arranged at differentrotational angle positions relative to the first carrier in a simplemanner. Also arranged on the ring-shaped part is stop at which a secondcarrier can strike. The ring-shaped part allows a rotational angle ofthe two carriers relative to one another to be set. The stop mechanismis arranged within a collar of the second carrier. The ring-shaped partcan be raised by inserting a tool into a groove running around an outercasing surface of the ring-shaped part to position the ring-shaped partat a desired rotational angle position relative to the first carrier. Afurther ring-shaped part is additionally provided on the first carrierand can be positioned relative to the ring-shaped part. The tworing-shaped parts are arranged within a collar and are radially andexternally enclosed and covered by the collar. Arranged in the collar isa locking pin introduced in radial direction which engages in anintermediate space formed by the two ring-shaped parts. The extent ofthe intermediate space in the circumferential direction is defined bythe relative rotational position of the first part relative to thesecond part. The angular range in which the two carriers can be rotatedrelative to one another can be defined over the extent of theintermediate space in the circumferential direction. The stop mechanismis essentially arranged on the first carrier and works together with thesecond carrier via the radially introduced locking pin.

DE 38 08 327 A1 describes a stop mechanism in which a threaded pin canbe displaced in a threaded hole in radial direction to set differentrotational angle positions.

The present invention seeks to solve the problem of furnishing arotatable connection which allows a rotational angle or rotational(angle) range to be set in a simple manner. In particular, it also seeksto solve the problem of furnishing a stand apparatus with rotationalangle limitation in which individual carriers of the stand apparatus canbe positioned in an operating room in a flexible manner by means of anadjustable rotatable connection.

This problem is solved through a rotatable connection for a standapparatus to be arranged in an operating room which comprises anadaptable stop mechanism which can be arranged between a firstconnection component (in particular a connection component of therotatable connection) and a second connection component (in particular aconnection component of the rotatable connection) mounted rotatablyaround a rotational axis relative to the first connection component andis configured to define at least two different relative rotationalangles of the connection components relative to the one another or atleast two different rotational ranges, the adaptable stop mechanismcomprising:

-   -   a first part which can be mounted rotationally lockable on the        first connection component and features at least one stop;    -   a second part, which can be provided or arranged non-rotatably        on the second connection component;        the first part being rotatably mounted relative to the second        part;        the adaptable stop mechanism comprising a stop device with at        least one counter-stop which is arranged axially (i.e. in        relation to the axial direction of the rotational axis) between        the two parts and can thereby interact with the two parts,        wherein the at least one counter-stop corresponds to the at        least one stop, the stop device being configured to define the        different relative rotational angles or rotational ranges by        means of the at least one counter-stop. In this way, an        adjustable, rotatable connection can be provided in a simple        manner. Adjustment can be made by, for example, axially        displacing and rotating the stop mechanism, particularly in a        manual manner. The separate stop mechanism can be arranged        between the two parts at different rotation positions. A pin or        locking pin arranged in radial direction is not required.        Rather, the components can be positioned toward one another in        axial direction. The counter-stops can be secured to the stop        mechanism in predefined positions. This also makes it possible        to define different rotational ranges, thus, for example, a        rotational range from true north (i.e., geographic north) of        360° in clockwise direction and counterclockwise direction, or a        rotational range starting from east of 360° or a rotational area        from true north of 360° In this manner, the action radius of,        for example, a stand apparatus can also be adapted and set in        relation to an arrangement near a wall or in a corner. The        (absolute/maximum) magnitude of the rotational angle is        preferably strictly prescribed, for example at 360°, 400° or        420°, through the geometric design of the stop mechanism, in        particular the stop device. The starting point of the rotational        movement is adjustable.

By arranging the stop mechanism both on the first connection componentand on the second connection component, a stop device can be providedwhich can be arranged and repositioned between the two connectioncomponents in a simple manner, in particular through the axialdisplacement of the first part relative to the second part.

The number of components can be kept low by using a stop device havingone or more counter-stops. The entire stop mechanism is preferablyconstructed from only three components, in particular the first part,the second part and the stop device.

The connecting of the first part to or mounting thereof on theconnection component described as rotationally lockable arrangement canbe furnished through, for example, two projections which strike oneanother or can engage one another, i.e. a form-fitting connection. Thefirst part is rotatably arranged around the rotational axis, inparticular together with the first connection component. When engaged,the first part can be rotated jointly with the first connectioncomponent, which can be ensured through a stop in the form of a pin or alocking pin. A rotationally locked arrangement can also include anarrangement which, while permitting a relative movement between theparticular part and the particular connection component, is limitedstarting at a certain rotational angle by some type of stop. Once thepart makes contact with the stop, a relative rotational movement betweenthe part and the connection component is no longer possible in thecorresponding rotational direction. In other words, a rotationallylocked arrangement prevents the first part from being further rotatedaround the first connection component, at least in a rotationaldirection. A rotationally locked arrangement allows a rotational range,in particular with a rotational angle greater than 360°, to be set. Arotationally locked arrangement can also include a non-rotatingarrangement, i.e. a groove-spring-connection.

The connection of the second part to or the mounting thereof on theconnection component described as non-rotating arrangement can berealized, for example, through a groove-spring-connection, i.e. aconnection which defines only a single relative position of the twocomponents to one another. A non-rotatable arrangement, connection ormounting can also include an arrangement in which the second part(one-piece) is designed as an integral part of the connection component.In particular, the second part can be integrated in a second connectioncomponent realized as a sleeve.

While the first part is preferably mounted on the first connectioncomponent in a rotationally locked manner, this is preferred only inregard to a rotational movement. In other words, the rotationally lockedarrangement does not necessarily involve a predefined axial position.Rather, the first part is mounted preferably on the second connectioncomponent in axial direction, in particular by means of the stop deviceand/or the second part. The first connection component can be axiallypositioned preferably on the second connection component in axialdirection, or vice versa, by means of a Seeger ring, for example.

The term rotatable connection is preferably understood to mean anarrangement that ensures a rotation of components in relation to oneanother at a definable angle. A rotatable connection is, for example, aconnection between a sleeve and a spindle, wherein the rotatableconnection does not necessarily include the sleeve and spindle, butrather only the bearing or bearing surfaces provided thereon for thesecomponents, for example. The rotatable connection preferably comprisesat least a swivel joint or forms a part of the swivel joint. A swiveljoint is preferably understood to mean a joint which allows at least arotation around one or more rotational axes, wherein a translatorydegree of freedom can also be realized. The swivel joint is preferablyarranged at the interface between two individual carriers, but can alsosubdivide an individual carrier into multiple sections. The swivel jointcan be provided, for example, at the interface between a spindle and asleeve.

A stand apparatus is preferably understood to mean an apparatus forholding, arranging in stationary position and/or displacing at least onemedical technology device which can be fixedly mounted on a wall (on awall bracket) or a ceiling or also on the floor of an operating room orany other room for medical purposes, i.e., a ceiling stand for example.The stand apparatus cannot be completely displaced freely in theoperating room, but can be displaced only within a certain actionradius, in particular relative to a fastening point or mounting pointarranged on a ceiling or wall of the operating room. The stand apparatuscan be designed as a ceiling supply unit mounted on a ceiling andcomprising one or more supply consoles, mounted and positionable on oneor two carrier arms. The stand apparatus can also be designed as amonitor carrier. The stand apparatus can also be designed as a so-calledspring arm, particularly for mounting on a wall, and can feature alight, for example. The stand apparatus can also be designed as aso-called central axis, particularly for mounting on a ceiling, and cancomprise a plurality of carrier systems having at least one carrier onwhich a monitor or light, for example, is mounted. The stand apparatusdoes not necessarily have to be fixedly mounted on a wall, but rathercan also be mounted on a mobile substructure. The mobile substructurecan be positioned in a stationary manner in the room by means of brakes,for example. An adaptable stop mechanism is expedient in this case aswell.

An adaptable stop mechanism is preferably understood to mean any devicewhich can limit a rotational angle and/or rotational range of a carrier,in particular relative to another carrier or relative to a (imaginary)rotational axis fixedly positioned in the room, for example a rotationalaxis running through a fixedly arranged fastening point on a wall of aroom. The adaptable stop mechanism at least also comprises aform-fitting connection or is designed for a form-fitting connection.The adaptable stop mechanism can additionally also function in aforce-locking manner.

Rotational range is preferably understood to mean an angular range inwhich a carrier can be rotated relative to another carrier or a wall.The angular range can be, for example, 330° or even more than 360°. Theangular range can be constant, but defined, for example, in relation todifferent circumferential positions, i.e., from 0° to 300° relative tonorth or from 30° to 330° relative to north, for example. The rotationalrange can be defined by different rotational angle positions.

The first part is preferably understood to mean a part which is somehowcoupled rotationally locked to the rotational movement of the firstconnection component (a spindle, for example) and interacts with thefirst connection component preferably in a form-fitting manner. Thefirst part can preferably be displaced in axial direction relative tothe first connection component. A relative displacement toward oneanother in circumferential direction is blocked or can be blockedstarting at a certain rotational angle. The first part can be designedas ring-shaped, for example, and can thus be referred to as a stop ringwhich defines at least one stop. A stop is preferably understood to meanany projection or ledge, in particular also protruding in axialdirection.

The second part is preferably understood to mean a part which isnon-rotatably coupled to the rotational movement of the first connectioncomponent (a sleeve, for example) and, for example, interacts with thesecond connection component in a form-fitting manner, in particular in arotationally synchronous manner. In other words, the second part isprovided on the second connection component in such a manner that thesecond part and the second connection component realize the samerotational movement in each case. The position of the second partrelative to the second connection component is then predefined and alsounchangeable. The second part can be formed by the second connectioncomponent, e.g. integrally cast thereon. The second part is preferablystationary on the second connection component, thus also fixed axially,i.e. cannot be displaced in axial direction relative to the secondconnection component. The second part is preferably connected only tothe second connection component or formed thereby and is decoupled fromthe first connection component and interacts indirectly with the firstconnection component only by means of the stop device and the firstpart. The second part can be designed as ring-shaped, for example, andcan comprise at least one form-fitting contour in the form of toothing,e.g. a sawtooth contour, in particular on the interface with the stopdevice. The second part can thus be referred to as a toothed ring.Preferably no stops or counter-stops defining a rotational range arearranged on the second part. Stops of this type are not necessary,particularly because a relative rotational movement between the secondpart and the stop device must not or should not occur. The second partis preferably configured to mount the stop device in a rotatably fixedmanner in an adjustable rotational position on the second connectionpart so that a stop of the first part can strike the stop device totransfer a correspondingly generated reaction force from the stop deviceto the second part. In other words, the first part is preferablyconnected to the second part only in an indirect manner, in particularvia the stop device.

The stop device is preferably understood to mean a part which isconfigured for the purpose of furnishing a counter-stop in a stationaryposition relative to one of the connection components, in particularrelative to the second connection component, wherein a (rotational)force exerted on the stop device in circumferential direction, thus atorque, can be transferred between the connection components via acounter-stop. The stop device is preferably configured to prevent directinteraction between the first and second part. The stop device ispreferably interposed between the first and second part and configuredto transfer a torque between the first part and the second part. Thestop device preferably extends at least in sections around therotational axis, the stop device preferably being designed asring-shaped and running circumferentially around the rotational axis. Inthis case the stop device can be described as an adjusting ring, forexample. Counter-stop is preferably understood to mean any protrusion,ledge or projection.

An arrangement “axially between” the first and second part is preferablyunderstood to mean an arrangement in which the first and second part arenot coupled directly to one another, but rather indirectly via the stopdevice. An arrangement “axially between” preferably means that the firstpart in axial direction does not have to engage the second part, butrather that an engagement or interaction between the first part andsecond part can be ensured (solely) by means of the stop device.

A rotational angle position is preferably understood to mean a relativerotational position of a carrier in relation to another adjacent carrieror in relation to an axis oriented fixedly in space in a defineddirection. The rotational angle position can be described in relation toan absolute (horizontal) angle, e.g. around a (imaginary) verticalrotational axis.

The stop device is preferably configured to transmit a rotational forceacting in circumferential direction and exerted on the stop orcounter-stop between the first and second part, i.e. from the first partto the second part and/or from the second part to the first part. Inother words, the stop device is configured to couple the two parts toone another, in particular also to define a certain rotational anglerange of the parts relative to one another.

According to an exemplary embodiment, the stop device can be positionedon one of the two parts in at least two different rotational anglepositions such that it is non-rotatable in relation to one of the twoparts, in particular to the second part. In this way, a starting pointor initial point of a particular rotational angle range can be set, inparticular at a rotational angle greater than 360°. The counter-stop ispreferably positioned on the stop device in a stationary manner. Thecounter-stop can be provided integrally on the stop device, i.e., thestop device and the counter-stop constitute a single part. Thecounter-stop or at least a counter-stop of a plurality of counter-stopscan optionally also be secured to the stop device by means of a threadedconnection in radial or axial direction. This simplifies the setting ofa particular rotational angle, for example.

The first part is preferably arranged such that it can be displacedalong the rotational axis in axial direction. In this way, the stopdevice can be shifted in axial direction together with the first part ina simple manner to adjust the rotational range or rotational angle. Itis not necessary to remove any pin engaging in radial direction or acollar accommodating the pin to displace the two parts relative to oneanother in axial direction. In this example, the first part can beguided to an inner casing surface on the second connection component viaa centering device.

The stop device is preferably arranged such that it can be displacedalong the rotational axis in axial direction, in particular togetherwith the first part. This allows the rotatable connection to be adjustedin a simple manner. For example, only the stop device needs to beengaged, and the first part can be shifted axially together with thestop device, in particular upward against the force of gravity.

The first part, the second part and the stop device are preferablyarranged linearly in axial direction one-after-the-other. In this waythe rotatable connection, in particular the starting or initial point ofthe rotational angle range, can be adjusted in a simple manner, inparticular by means of the first part and the stop device being shiftedaway from one another axially.

Axially displacing the parts and the stop device toward one anotherallows the rotational range to be adjusted in a simple manner. A dampingelement can also be provided between the parts or between one of theparts and the stop device in a simple manner. The linear arrangementone-after-the-other also facilitates simple assembly. A lineararrangement one-after-the-other can be understood as an arrangement inwhich (disregarding a possibly interposed damping element) the firstpart comes contacts the stop device and in which the stop devicecontacts the second part.

The stop device is preferably arranged in axial direction between thetwo parts and overlaps in axial direction the second part in the area ofa form-fitting contour and overlaps in axial direction the first part inthe area of the stop. Having the first part and the stop device arrangedoverlapping one another in axial direction allows the stop mechanism tobe furnished in the form of a connector system of simple construction.Good stability of the arrangement can be ensured, in particular becausethe first part and the stop device can be stabilized against tilting,specifically by means of the inner and or outer casing surface of thestop device. The first part is preferably dimensioned and geometricallydesigned such that the first part, in particular the at least one stop,can be arranged around the stop device at least partly outside and/or atleast partly within the stop device. This arrangement makes it possibleto arrange the at least one counter-stop on an outer or inner casingsurface of the stop device, thereby allowing a force to be furtherconducted in circumferential direction. The counter-stop can be designedto be especially robust and solid.

The first and/or second part preferably extends at least in sectionsaround the rotational axis, the first and/or second part preferablybeing designed as ring-shaped and running circumferentially around therotational axis.

According to an embodiment, the first part is designed as ring-shapedand comprises two or more stops which are arranged opposite one anotherand protrude in axial direction from a disc, in particular on an outercasing surface or circular ring surface. The first part can comprise anarea that is designed as rotationally symmetrical, in particulardisc-like. A disc is preferably understood to be a primarily flat partextending essentially in a radially oriented plane, while extending to aclearly lesser degree in axial direction orthogonal to the plane. Theadvantage of the disc design is that a sliding surface can be furnishedon a particular end face of the disc in a simple manner.

According to an exemplary embodiment, the first part and the stop deviceand optionally also the second part can be axially arranged or axiallypositioned or mounted on the second connection component in axialdirection. Preferably at least the first part and the stop device arepositioned axially on the second connection component in axial directionsolely through the force of weight. This free arrangement (withoutadditional fastening means) allows an adjustable or adaptable stopmechanism to be furnished in an especially simple manner.

According to an exemplary embodiment, the stop device is arranged suchthat a nonrotatable arrangement of the stop device on the second part isensured (in particular exclusively) by weight as well as gravity actingon the stop device. In this case, adapting the stop mechanism requiresonly displacing the stop device, in particular jointly with the firstpart, against a weight force acting on the stop device. It is notnecessary to remove any radially introduced locking pins or bolts.Instead, the first part can be axially secured by means of a circlip.

According to an exemplary embodiment, the second part has a form-fittingcontour for setting the individual rotational angle positions,particularly on an inward pointing casing surface and/or on an end facepointing in axial direction. The stop device has a correspondingform-fitting contour, in particular on an end face pointing in axialdirection to the second part or second connection component. In thisway, an easily accessible plug-in connection can be furnished by meansof which the stop mechanism can be adjusted or adapted.

A form-fitting contour is preferably understood to mean a toothing ortoothed contour or a contour with regular interruptions or protrusions.The individual tooth can be shaped primarily as desired. The individualtooth is preferably of cuboid shape with a rectangular cross-section.The form-fitting contour is not necessarily exclusively form-fitting,but can also be force-locking. The form-fitting contour is preferablynot materially bonded to ensure that the at least one counter-stop canbe reversibly positioned at various rotational angle positions asfrequently as desired.

The form-fitting contour of the second part is accessible in an axialdirection at least nearly parallel to the rotational axis such that thestop device with the corresponding formfitting contour in axialdirection can be inserted onto the second part. This simplifies bothassembly and adjustment.

The form-fitting contour of the second part and the form-fitting contourof the stop device are each designed as a toothed ring, the teeth ofwhich preferably project in an axial direction nearly parallel to therotational axis. Toothed ring is preferably understood to mean a contourdesigned to be rotationally symmetrical in relation to the rotationalaxis with a plurality of individual teeth, the teeth being arranged at auniform distance from one another. The embodiment as toothed ringoffers, for example, the advantage of smaller adjustment intervals,since the more teeth that are provided, the more precisely the startingor initial point of the rotational angle range can be defined, e.g., in10°-increments.

According to an exemplary embodiment, the first part and the stop devicetogether form a bearing, in particular a slide bearing, with the firstpart lying on the stop device. In this way, the first part can bedisplaced relative to the stop device or the second part with lowfriction even if a normal force acts on the contact surface between thefirst part and the stop device. The normal force does not have to belarge, because it can correspond to the weight force of the first part,for example. The bearing can facilitate a free-moving rotatableconnection and optimize the interaction of the individual components ofthe rotatable connection. The stop device is preferably arranged betweenthe first part and the second part such that the first part contactsonly the stop device, but not the second part. The second part likewisecontacts only the stop device. In other words, the first part interactswith the second part (preferably only) through the stop device.

According to an exemplary embodiment, the first part comprises a slidingsurface arranged on an end face, particularly on an end face pointingtoward the stop device, and is configured to rotate with the slidingsurface on the stop device in a sliding manner. Additionally, the stopdevice can comprise a sliding surface arranged on an end face, inparticular on an end face pointing toward the first part and away fromthe second connection component, and is configured to mount the firstpart by means of the sliding surface for a sliding rotational movementaround the rotational axis. The sliding surface of the first part and/orthe sliding surface of the stop device can preferably be designed, forexample, as either a fully continuous or also segmental annular circularring surface. In this way, the bearing for the second part can befurnished in a simple and cost-effective manner. The planar resting onthe stop device allows a robust stop mechanism to be furnished which canbe manually operated in a simple manner. No bolts or other securingmeans or fastening elements have to be loosened. At the most there wouldbe an optionally provided circlip for axially securing the first part.The interlocking of the components, i.e., the first part, the stop ringand the second part can be ensured through the force of gravity alone.

The planar mounting on the ring-shaped end faces can ensure exactpositioning of the components relative to one another and render therotatable connection very robust and allow it to move very smoothly.

A sliding surface is preferably understood to mean a surface which has alow frictional coefficient for sliding friction, be it due to anespecially low roughness or an especially smooth surface, be it due tolow-friction material with lubricating properties. The material for thestop device or adjusting ring can be, for example, coated or uncoateddie-cast zinc.

The stop device is preferably designed as an adjusting ring with aform-fitting contour projecting from an end face in axial directiontoward the second part. An adjusting ring is preferably understood tomean (disregarding any stops) a rotationally symmetrical part which canbe positioned in various rotational angle positions, e.g. each offset by15°, thus for example in 24 different rotational angle positions.

The stop device is a one-piece part that can be inserted onto the secondpart in axial direction and on which the at least one counter-stopprojects preferably in radial direction, in particular from an outer orinner casing surface of the stop device. In this way, the space requiredin the axial direction (the required installation height) can be keptlow and a flat construction can be realized.

According to an exemplary embodiment, the adaptable stop mechanism isconfigured to adjust a rotational area with a relative rotational anglegreater than 360°, in particular between 360° and 420°. The rotationalangle greater than 360° can be ensured in particular by arranging thefirst part on the first connection component not in a non-rotatable ortorque-proof manner, but rather only in a rotationally locked manner.The first part preferably has a form-fitting element where ananti-rotation means, e.g. a pin, of the first connection element canmake contact. The form-fitting element (in contrast to the stop of thefirst part) is preferably decoupled from the stop device, and thus doesnot interact with the stop device, at least not in terms of a coupledrotational movement. In this case, the starting or initial point for therotational movement or the rotational angle range can be defined bymeans of the stop device, in particular by defining the relativeposition of the stop device relative to the second part. Theproportionally large rotational angle of more than 360°, in particularup to 420°, offers the advantage of great flexibility, for example. Thestops can be positioned without adversely decreasing the freedom ofmovement of the stand apparatus. In contrast, known rotatableconnections usually allow only a rotational (angle) range to be set witha smaller rotational angle of maximally around 330°. In other cases,adjusting the rotational angle range is very laborious or is notpossible at all.

According to an exemplary embodiment, the adaptable stop mechanismcomprises a damping element, in particular made of elastomer, whichcorresponds to the second part and/or the stop device, in particular aform-fitting contour of the stop device projecting from an end face inaxial direction. In this way it can be ensured that an impact isdampened when the stops come into contact with one another, therebyallowing the service life of the rotatable connection to be increasedand/or the stand apparatus, in particular a medical technology device,to be protected. The damping element can prevent the carrier fromswinging back or recoiling if the stops abruptly strike one another. Adamping element is preferably understood to mean a rubber element havinga geometry adapted to the particular form-fitting contour. The dampingelement can be in the shape of a meander, for example. The dampingelement can be arranged as inlay or jacket on the second part or on thestop device, namely on a particular form-fitting contour.

According to an exemplary embodiment, the rotatable connection comprisesan intermediate element which is arranged, when viewed in axialdirection, between the first part, in particular between the stopdevice, and the second connection component and at least oneform-fitting contour for torque-proof connection with the stop device orthe second connection component, wherein a form-fitting contour isarranged preferably on each of the two opposite lying end faces of theintermediate element. In this way, the stop mechanism arranged on thetwo connection components can be designed even more flexibly and can beprovided in a simple manner in particular if cast sleeves are used. Theform-fitting contour can ensure the non-rotation of additional elements,e.g. a slip ring inner part. The intermediate element offers advantagesalso in terms of manufacturing considerations. In particular, theform-fitting contour can be made on the second part in a simpler manner,specifically on a ring-shaped segment of a forked sleeve. For example,the use of an expensive die casting tool is not necessary.

An intermediate element is preferably understood to mean an element thatcan be nonrotatably coupled in a form-fitting manner to both the stopdevice and the second part. The intermediate element is an optionallyprovided, additional part on which a form-fitting contour can berealized in an especially simple manner, preferably on an end face. Theintermediate element can also be provided for manufacturing reasons, forexample. The intermediate element can be machined, in particularprovided with the form-fitting contour(s), in a simple manner. Theintermediate element can be handled in a simple manner and has easilyaccessible upper surfaces. The (particular) form-fitting contour ispreferably made of grooves running in radial direction. The grooves canextend along the entire intermediate element. The grooves can optionallybe provided in combination with springs in sections (as short grooves).

According to an embodiment, the intermediate element can be designed asa disc, in particular a ring-shaped disc. In this way, the intermediateelement can be arranged in a row with the other components around thefirst connection component. The flat construction as a disc can alsoensure that minimal space is required in axial direction.

According to an exemplary embodiment, the intermediate element isdesigned as wedge-shaped with a non-uniform axial dimension or thicknessin relation to the axial direction.

In this way, the rotatable connection can be used in a simple mannerwith a cast sleeve on which a draft angle is provided. The wedge-shapeddesign allows the draft angle to be compensated so that the two partsand the stop device can be arranged oriented axially in relation to oneanother. In other words, the wedge-shaped geometry is arranged tocompensate the draft angle of the sleeve.

The problem specified earlier is also solved by a carrier system for astand apparatus for arranging in an operating room and for positioning amedical technology device in the operating room which comprises arotatable connection according to the invention as well as the firstconnection component, in particular in the form of a spindle, and thesecond connection component, in particular in the form of a sleeve.

A carrier system is preferably understood to mean those components ofthe stand apparatus which at least partly also assume the function ofholding and positioning the medical technology device. The carriersystem can comprise a plurality of preferably rigid arms or carrierseach displaceable relative to one another as well as a plurality oflevers, joints or bearings.

A medical technology device is preferably understood to mean a light, amonitor and/or a supply console through which means for treating apatient and/or instruments for a surgeon and/or light, fresh air orother media required in the operating room can be furnished. The medicaltechnology device preferably comprises some type of operating paneland/or some type of display device for graphically presenting patientdata, for example.

According to an exemplary embodiment, the second connection component isdesigned as a sleeve, in particular a forked sleeve, wherein at leastthe stop device and the second part and preferably also the first partare arranged in the sleeve, in particular between two ring-shapedsegments of the sleeve, preferably in one of the two ring-shapedsegments, wherein the rotatable connection preferably comprises anintermediate element which is inserted into the sleeve, in particularinto one of the two ring-shaped segments.

In this way a rotatable connection can be furnished, the stop device ofwhich is easily accessible, thereby making it easier to adjustrotational angle or rotational angle range. The individual componentscan be placed in the sleeve in a simple manner, in particular from theside in radial direction. An additional intermediate element can also beplaced in the sleeve, in particular in one of the two ring-shapedsegments, in particular to compensate a draft angle and/or allow theform-fitting contours to be produced in a simple or cost-effectivemanner. The individual components can also be displaced relative to oneanother in axial direction in a simple manner to adjust rotational angleor rotational range.

The intermediate element also allows an especially flat construction ofthe rotatable connection in axial direction to be ensured, which isadvantageous in the case of central axes, for example, most of which arealready considerably expansive in axial direction.

The problem specified earlier is also solved by a stand apparatus forarranging in an operating room and for positioning a medical technologydevice in the operating room which comprises a rotatable connectionaccording to the invention or the previously described carrier systemhaving the rotatable connection according to the invention.

In a specific embodiment, the stand apparatus for arranging in anoperating room and positioning a medical technology device in theoperating room comprises a carrier system having at least one carrier,in particular a carrying arm, with a sleeve which is mounted rotatably(relative to a stationary part of the stand apparatus or to anothercarrier of the stand apparatus) around a rotational axis on a spindle ona rotatable connection, in particular a rotatable connection accordingto the invention, the rotatable connection comprising an adaptable stopmechanism which is arranged between the spindle and the sleeve mountedrotatably around the rotational axis relative to the spindle and isconfigured to define at least two different relative rotational anglesof the spindle relative to the sleeve or at least two differentrotational ranges, the adaptable stop mechanism comprising

-   -   a first part, in particular a stop ring, which can be mounted        rotationally locked on the spindle and features at least one        ring;    -   a second part which is non-rotatably connected to the sleeve;    -   the first part being rotatably mounted relative to the second        part; the adaptable stop mechanism comprising an adjusting ring        arranged axially displaceable in the direction of the rotational        axis and having at least one counter-stop which, when viewed in        axial direction, is arranged between the two parts (and        interacts with the two parts), wherein the at least one        counter-stop corresponds to the at least one stop and wherein        the adjusting ring is configured to define by means of the at        least one counter-stop the different relative rotational angles        or rotational ranges, and wherein the first part overlaps the        adjusting ring in axial direction and is arranged radially        inside and outside in relation to the adjusting ring and/or        wherein, when viewed in axial direction, an intermediate element        is arranged between the adjusting ring and the second part such        that it is non-rotatable in relation to the adjusting ring and        the second part.

In this way, the stand apparatus, in particular individual carriers, canbe positioned relative to one another in a flexible manner. Thecounter-stop can be displaced in the second part to define a suitablerotational angle position, particularly in terms of a specificarrangement of the stand apparatus relative to other components in theoperating room.

A carrier is preferably understood to be a boom or supporting arm whichextends in a certain direction and can ensure the desired action radiusfor the various desired positions of the medical technology deviceparticularly through a rotational movement around a rotatableconnection. The carrier can optionally be pivoted up and down and/ordisplaced up and down in translatory motion. The carrier can also be atelescopic device with a (additional) degree of freedom of movement inthe translatory direction along the longitudinal axis of the carrier.The carrier can be formed at least partly, for example, by acontinuously cast section, in particular a continuously cast aluminumsection.

The stop device makes it possible to define a rotational range or aspecific rotational angle of the rotatable connection, in particular areliable relative rotational angle of the two connection components inrelation to one another.

The second part is preferably arranged on the carrier or, as the casemay be, one of the carriers in the area of the rotatable connection. Acontour or a stop can be fixed on one of the carriers in a stationarymanner, by means of which the carrier can be positioned in the variousrotational angle positions in relation to the other carrier or inrelation to any other part arranged in a stationary manner.

The invention is described in greater detail using exemplary embodimentsillustrated in the following figures. Shown are:

FIG. 1 a schematic illustration in perspective view of a rotatableconnection according to an exemplary embodiment of the invention;

FIG. 2 a perspective sectional view of the rotatable connectionaccording to the exemplary embodiment shown in FIG. 1;

FIG. 3A a perspective side view of the rotatable connection according tothe exemplary embodiment shown in FIG. 1 in exploded view;

FIG. 3B a perspective side view of the rotatable connection according tothe exemplary embodiment shown in FIG. 1 in another exploded view;

FIGS. 4A, 4B and 4C a partly sectional top view of the rotatableconnection according to the exemplary embodiment shown in FIG. 1 invarious rotational angle positions;

FIG. 5 a perspective side view of an intermediate element of a rotatableconnection according to a further exemplary embodiment of the invention;

FIG. 6 a side view of the intermediate element shown in FIG. 5; and

FIG. 7 a schematic illustration in perspective view of a rotatableconnection according to a further exemplary embodiment of the invention;

FIG. 8 a perspective sectional view of the rotatable connectionaccording to the exemplary embodiment shown in FIG. 7;

FIG. 9 a perspective side view of the rotatable connection according tothe exemplary embodiment shown in FIG. 7 in exploded view;

FIG. 10 a perspective sectional view of the rotatable connectionaccording to the exemplary embodiment shown in FIG. 7 in exploded view;

FIG. 11 a perspective side view of a damping element for a rotatableconnection according to an exemplary embodiment of the invention; and

FIG. 12 a perspective side view of a rotatable connection according to afurther exemplary embodiment of the invention in exploded view.

In the description of the following figures, individual referencenumbers apply to the additional figures unless it is explicitly statedthat they relate to a particular figure.

FIG. 1 shows a rotatable connection which is arranged on a standapparatus 100 around a rotational axis R. The stand apparatus comprisesa carrier system with a first carrier 102 and at least one additionalcarrier (not explicitly illustrated). The rotatable connection 1comprises a first connection component 10, particularly in the form of aspindle, and a second connection component 20, in particular in the formof a sleeve. The first carrier 102 is mounted around the firstconnection component 10 and is connected to the second connectioncomponent 20. The sleeve 20 can be described as forked and comprises twoopenings 21 each arranged in a ring-shaped segment 22 of the sleeve 20through which the first connection component 10 is fed. Formed betweenthe ring-shaped segments 22 is a cavity which is manually accessible inradial direction, particularly for adapting a stop mechanism 30. Theaxial position of the sleeve 20 on the spindle 10 can be defined bymeans of a Seeger ring or a lock nut secured to the spindle.

The rotatable connection 1 comprises an adaptable stop mechanism 30arranged between the spindle 10 and the sleeve 20. The stop mechanism 30comprises a first part 40 and a second part 50. In the exemplaryembodiment shown, the first part 40 is designed as a stop ring and thesecond part 50 as a toothed ring (see FIG. 3B). The toothed ring 50 isarranged within the sleeve 20, in particular on an inner casing surfaceof one of two ring-shaped segments of the forked sleeve 20. The stopring 40 comprises multiple stops 42 which protrude on an end face of thestop ring 40 in axial direction. The stops 42 are fixedly positioned onthe stop ring 40. Arranged between the stop ring 40 and the toothed ring50 is a stop device 60 which forms a part of the adaptable stopmechanism 30. In the exemplary embodiment shown, the stop mechanism 60is designed as an adjusting ring. The adjusting ring 60 comprisesmultiple counter-stops 62 which are arranged on an outer casing surfaceof the adjusting ring 60 and protrude in radial direction. Thecounter-stops 62 are fixedly positioned on the stop ring 60. The stops42 and the counter-stops 62 each feature at least one flat side surface42.1, 62.1 (see FIGS. 3, 4) which preferably extend at least roughly ina plane running parallel to the rotational axis R. The flat sidesurfaces 42.1, 62.1 form stop surfaces at which the stops 42, 62 cancome to a rest against one another when the stop ring 40 is rotatedrelative to the adjusting ring 60. The flat side surfaces 42.1, 62.1correspond to one another. The adjusting ring 60 can be positionednonrotatably on the sleeve relative to the sleeve in various rotationalangle positions, as is described more clearly using the FIGS. 3A and 3B.

FIG. 2 shows how the stop ring 40 can be mounted rotationally locked onthe spindle 10. The spindle 10 is designed as a hollow shaft at least insections. Arranged in the spindle 10 is anti-rotation means 13, inparticular a pin, which can ensure that the stop ring 40 can be rotatedrelative to the spindle 10 only within a certain rotational (angle)range. The stop ring 40 comprises a form-fitting element 43 whichcorresponds to the pin 13 and is arranged on the inner side of the stopring 40. Owing to, for example, the dimension of the stop andcounter-stop in circumferential direction, the rotationally lockedarrangement allows a dead angle to be bypassed. The rotationally lockedarrangement allows a predefined rotational range with a rotational anglegreater than 330°, or also greater than 360°, in particular up to 420°.A rotationally locked stop ring 40 can also be called an intermediatering, which bypasses a dead angle and is operatively arranged betweenthe spindle 10 and the counter-stops 62.

The spindle 10 features a groove 11 for accommodating a circlip 80. Thecirclip 80 can prevent the stop ring 40 from becoming displaced upwardin axial direction. The stop ring 40 comprises a (second) end face 47which can contact the circlip 80. The circlip 80 can be removed in asimple manner to adjust the rotatable connection 1. For this purpose,the stop ring 40 can be shifted upward. The adjusting ring 60 is thenshifted upward until the adjusting ring 60 no longer engages in thesleeve 20 or the (not illustrated in detail, realized on the inside ofthe sleeve 20) toothed ring 50. Next, the adjusting ring 60 is rotatedand shifted downward again in a different rotational angle position andengaged with the sleeve 20 or the toothed ring 50. However, the circlip80 is not necessarily required. The adaptable stop mechanism can beadapted even without any type of lock screws or circlips whatsoever.

The adjusting ring 60 has a diameter which is smaller than a dividedcircle on which the stops 42 are arranged and larger than a dividedcircle on which the form-fitting element 43 is arranged. In other words,the stop ring 40 surrounds the adjusting ring 60 in radial directionwith the form-fitting element 43 lying inside relative to the adjustingring 40 and the stops 42 lying outside relative to the adjusting ring60. The inner diameter of an inner casing surface of the adjusting ring60 is clearly larger than the outer diameter of an outer casing surfaceof the spindle 10. The adjusting ring 60 is not mounted on the spindle10.

Rather, the adjusting ring 60 can be centered from outside on its outercasing surface on the second part 50 or in the sleeve 20. The stop ring40 can be centered over the outer casing surface of the adjusting ring60 via the stops 42. It is not necessary to center on the spindle 10.This can ensure a relative rotational movement with low friction.

FIG. 3A shows the rotatable connection 1 in an arrangement in which therotational angle position can be adjusted. The adjusting ring 60 hasbeen displaced upward in axial direction after the circlip has been 80removed or released from the corresponding groove. In this way, aform-fitting contour 64 of the adjusting ring 60 can be detached from acorresponding form-fitting contour 54 of the toothed ring 50 shown inFIG. 3B or pulled out in axial direction. The adjusting ring 60 isarranged displaceably in axial direction along the rotational axis R, inparticular together with the stop ring 40. The adjusting ring 60 and thestop ring 40 are arranged in axial direction one-after-the-other in arow and engage one another in axial direction. The form-fitting contour64 is designed as toothing which projects in axial direction. Theform-fitting contour 64 comprises a plurality of individual teeth 64.1arranged in circumferential direction on the underside of the adjustingring 60 at a uniform distance on a divided circle. The form-fittingcontour 64 allows the adjusting ring 60 to be positioned in at least twodifferent rotational angle positions non-rotatably in relation to the(not shown) second part or toothed ring.

A damping element (not visible here, shown only in FIGS. 11 and 12) canbe arranged on the form-fitting contour 64, the damping element beingable to act between the formfitting contour 64 and the form-fittingcontour 54 of the second part 50 shown in FIG. 3B. The damping elementcan be designed, for example, as a meander-shaped ring made of anelastomer, with a geometry corresponding to that of the teeth 64.1.

FIG. 3A shows that the adjusting ring 60 has three counter-stops 62 (twoof which are visible) which are arranged displaced from one another byan angle of approximately 120° in circumferential direction. Likewisearranged on the stop ring 40 are three stops 42 which are arrangeddisplaced from one another by an angle of approximately 120° incircumferential direction. Additionally, the form-fitting element 43 isarranged at a circumferential position at least roughly centered betweentwo of the three stops 42. This arrangement of the stops 42 and theform-fitting element 43 relative to one another can, in particular, alsoensure a favorable distribution of load.

FIG. 3A additionally shows a disc-shaped section 41 of the stop ring 40.The three stops 42 project from the disc-shaped section 41 in axialdirection. The stops each have a concave or concavely curved inwardinner surface 42.2 by means of which they can come to a rest at an outercasing surface 60.1 (with at least approximately the same curvatureradius) of the adjusting ring 60. The form-fitting element 43 has aconvex or convexly curved outward outer surface 43.1 by means of whichthe form-fitting element 43 can come to a rest at an inner casingsurface 60.2 (with at least approximately the same curvature radius) ofthe adjusting ring 60. In this way, a relative rotational movement canbe realized without jamming and by means of abutting in a sliding mannerand mutual guiding or centering.

FIG. 3B shows how the adjusting ring 60 can be coupled to the sleeve 20.The formfitting contour 54 is arranged at an inwardly pointing casingsurface 20.2 of the sleeve 20 and projects inwardly in radial direction.The form-fitting contour 54 comprises a plurality of individual teeth54.1 arranged in circumferential direction on the casing surface 20.2 ata uniform distance on a divided circle. The adjusting ring 60 can bearranged radially between the spindle 10 and the sleeve 20 in a cavity,and the anti-rotation means or the pin 13 protrudes into a cavity formedradially between the spindle 10 and the adjusting ring 60 in which theform-fitting element 43 can be displaceably arranged. The adjusting ring60 can be arranged in radial direction between the form-fitting element43 and the stops 42.

FIGS. 3 and 4 show that the stop ring 40 can, via a (first) end face 46come to rest on a corresponding end face 66 of the adjusting ring 60 andglide along it when a relative rotational movement occurs. The end face46 features a ring-shaped sliding surface section (or a bearing) whichis arranged between the stops 42 and the form-fitting element 43. Inother words, the adjusting ring 60 forms a bearing for the stop ring 40,in particular a sliding surface. For this purpose, the end face 66 canalso have, for example, a coating with a low frictional coefficient orthe adjusting ring 60 can be made at least partly from an appropriatematerial. The same applies for the stop ring 40 as well as the surfaces42.2 and 43.1 and 46. However, the force acting on the end face 66 isnot large, with the stop ring 40 being only of comparatively low weight.A frictional force between the stop ring 40 and the adjusting ring 60can be nearly negligible in this arrangement. The end faces 46, 66 aswell as appropriate sections can also be referred to as sliding surfacesand sliding surface sections, respectively.

The mode of function of the stop mechanism is briefly described below onthe basis of FIGS. 4A, 4B and 4C: the spindle 10 (and with it also theradial pin 13 secured in the spindle 10) forms a fixed component, whilethe sleeve 20 constitutes the movable component. When a carrier (notshown) is displaced, the sleeve 20 is rotated counterclockwise relativeto the spindle 10 starting from a relative position shown in FIG. 4Auntil the form-fitting element 43 of the stop ring (of which only theshaded stops 42 and the formfitting element 43 are visible in thesectional view shown) encounters the radial pin 13, corresponding to arotational angle of approximately 330° in this case. The adjusting ring60 is arranged non-rotatably on the sleeve 20 and rotates to the sameextent as the sleeve 20. Starting from the rotational point shown inFIG. 4B, a relative movement between the stop ring and the adjustingring 60 is possible. In particular, the adjusting ring 60 can slidebeneath the stop ring relative to the stop ring and can be furtherrotated until the corresponding counter-stop 62 strikes the side surface62.1 at the corresponding side surface of the stop 42 of the stop ring,which in this exemplary embodiment allows a relative rotation of anadditional 90°. The side surface of the stop 42 labelled 42.1 in FIG. 4Cis then exposed, and the corresponding counter-stop 62 is brought withits side surface 62 facing forward in rotational direction to a rest atthe opposite side surface of the stop 42. In the position shown in FIG.4C, the sleeve 20 was rotated counterclockwise around the spindle 10 bymore than one complete revolution. This rotationally lockable couplingbetween spindle 10 and adjusting ring 60 can ensure a rotational rangegreater than 360°, e.g. up to 420°. The mechanism can accordingly beused in the opposite rotational direction.

FIG. 3B also indicates a centering means 45 of the stop ring 40 by meansof which the stop ring 40 can be centered in relation to the spindle 10.The centering means 45 can be formed by an inner casing surface or asection of an inner casing surface of the stop ring 40. The inner casingsurface does not necessarily have the same diameter as the outer casingsurface of the spindle 10, but rather can also be of somewhat greaterdiameter to facilitate a simple relative shifting with little friction,be it in circumferential or axial direction. The centering device 45 canadditionally be formed also by an inwardly pointing surface section ofthe form-fitting element 43, thereby ensuring even more effectively thatno jamming occurs on the spindle 10 when the stop ring 40 is displacedaxially. However, the centering device 45 does not have to solely ensurethe arrangement of the stop ring 40. Instead, it can be providedoptionally (additionally). Centering can be also be realized simplythrough the concave inner surface 42.2 of the stop ring on the adjustingring 60, with it being possible to center the adjusting ring 60 itselfon the second part. These centering options permit a simple arrangementof components that can be arranged relative to one another in a precisemanner.

In the exemplary embodiment shown, a particular rotational range with arotational angle greater than 360°, in particular a rotational anglebetween 360° and 420°, can be achieved

FIG. 5 shows an intermediate element 70 which has at one end face (asshown on the top side) a first form-fitting contour 74 and at anotherend face (as shown on the bottom side) a second form-fitting contour 75.The form-fitting contours 74, 75 each have individual grooves 74.1,75.1. The grooves 75.1 arranged on a first end face 76 extend in radialdirection. The grooves 75.1 are preferably arranged at a uniform angleto one another, i.e., at a uniform distance from one another when viewedin circumferential direction. The grooves 74.1 arranged on the secondend face 77 extend in a straight line and are preferably orientedparallel to one another. The grooves 74.1 are preferably spaced at auniform distance from one another. The intermediate element 70 is ofring-shaped design, and the end faces 76, 77 are flat or planar. Theintermediate element is designed as a ring-shaped disc.

The intermediate element is shown in side view in FIG. 6. As FIG. 6illustrates, the first end face 76 is arranged at an angle α in relationto the second end face 77, corresponding to the slope of a draft angle.The angle α is preferably around 1.5°. The end faces 76, 77 are notparallel. The intermediate element 70 is designed as wedge-shaped, inparticular as a wedge-shaped annular disc. In this way, a draft angle ofthe sleeve can be compensated as is described in greater detail aided byFIG. 7. The end face 76 preferably corresponds to the end face which iscoupled to the adjusting ring 60.

FIG. 7 shows an exemplary embodiment differing from that shown in FIGS.1 through 3B in that the intermediate element 70 shown in FIGS. 5 and 6is provided. Viewed in axial direction, the intermediate element 70 isarranged between the sleeve 20 and the adjusting ring 60. Theintermediate element 70 is placed in the sleeve 20. As FIG. 8 shows, theintermediate element 70 can be slid onto one of the ring-shaped sections22 of the sleeve 20. This allows a flat construction of the rotatableconnection 1 a to be realized. The first end face 76 points toward theadjusting ring 60. The radially oriented grooves 75.1 correspond to theindividual teeth 64.1 of the adjusting ring 60. The grooves 74.1 orlongitudinal ribs on the second end face (neither of which areillustrated) correspond to an appropriate form-fitting contour of thesecond part which is arranged within the sleeve 20 (not visible) and ispreferably formed by the sleeve 20 itself. Longitudinally extendinggrooves or recesses can be made in the sleeve 20 in an easy as well ascost-effective manner, in particular more easily than radially orientedgrooves.

The sleeve 20 can be designed as a cast part, for example. In this casethe sleeve 20 preferably features a draft angle, particularly also inthe area of the form-fitting contour of the second part which can befurnished through the sleeve 20. The draft angle is provided forremoving a finished cast sleeve 20 from a mold. If the sleeve isdesigned as a cast part, a draft angle cannot be readily (withoutelaborate design measures) omitted. For compensating this mold draft,the intermediate element 70 can comprise end faces 76, 77 which arearranged toward one another at an angle α corresponding to the angle ofthe mold draft. In other words, the intermediate element 70 can, on onehand, make it possible for the formfitting contour of the second part tobe made in the second part and in the sleeve in a simple manner. On theother hand, it can ensure a strict axial arrangement of the individualcomponents in relation to one another even if the sleeve is designed asa cast part. The intermediate element 70 thus makes it possible for therotatable connection to be furnished and configured in a simple andcost-effective manner, even in the case of cast sleeves.

In the exemplary embodiment shown in FIG. 7, realized on the adjustingring 60 at an outer casing surface of the adjusting ring 60 is a lug 61from which a counter-stop 62 protrudes in axial direction upward to thestop ring 40. The counter-stop 62 is realized as a type of pin. The stopring 40 features on an outer casing surface of the disc-shaped segment41 a lug 41.1 which protrudes in radial direction and forms a stop 42.Nevertheless, the components 40 and 60 in the exemplary embodiment shownin FIG. 7 can also, as a modification, be furnished according to thevariants shown in FIGS. 1 through 3B. In the exemplary embodiment shownin FIG. 7, the stop ring 40 is connected in a torque-proof manner to thespindle 10. A relative rotational movement between the spindle 10 andthe stop ring 40 is thereby prevented.

FIG. 8 shows that the intermediate element 70 can be slid onto a ringsection 22 of the sleeve 20 before the sleeve 20 is arranged on thespindle 10. The lower (second) end face 77 on which the straight groovesrunning parallel to one another are arranged points toward the ringsection 22. Corresponding grooves forming the form-fitting contour 54can be provided on the ring section 22. The stop ring 40 is mounted onthe spindle in such a manner that it is not only rotationally lockable,but also non-rotatably plus axially displaceable thereon. Thecorresponding anti-rotation means 13 is designed here as a grooverealized in the outer casing surface of the spindle 10 in which theform-fitting element 43 engages.

FIGS. 9 and 10 show an arrangement of the components in which theadjusting ring 60 can be positioned at a certain rotational angleposition relative to the intermediate element 70. In this case, axiallydisplacing the intermediate element 70 is not necessarily required. Thering section 22 features an end face 22.1 for accommodating theintermediate element 70. The end face 22.1 features a cavity formedbetween the two ring sections. The formfitting contour 54 is realized onthe end face 22.1. The ring section 22 comprises the second part. Thesecond part is integrated into the ring section 22.

FIG. 11 illustrates a damping element 90. The damping element is arubber element having a geometry adapted to the particular form-fittingcontour. The damping element has the shape of a meander.

FIG. 12 shows an adaptable stop mechanism 30 comprising an arrangementhaving a spindle 10 and a sleeve 20 comparable to the arrangement shownin FIG. 3B. The damping element 90 shown in FIG. 11 is arranged betweenthe adjusting ring 60 and the second part 50. The advantage of thearrangement between the adjusting ring 60 and the second part 50 is thatit does not require a relative movement on the damping element 90. Aformfitting contour 94 on the damping element 90 is formed on both endfaces of the damping element 90. In both axial directions, theform-fitting contour comprises a toothed geometry with teeth 94.1 and94.2. The form-fitting contour 94 corresponds to both the formfittingcontour 54 of the second part 50 and the form-fitting contour 64 of theadjusting ring 60. The damping element 90 is arranged on the second part50 as an inlay or on the adjusting ring 60 as a casing surrounding theform-fitting contour 54 or 64.

In one embodiment, a rotatable connection for a stand apparatus to bearranged in an operating room and including an adaptable stop mechanismwhich can be arranged between a first connection component and a secondconnection component mounted rotatably around a rotational axis relativeto the first connection component and is configured to define at leasttwo different relative rotational angles of the connection componentsrelative to the one another or at least two different rotational rangesis provided. The adaptable stop mechanism may include a first part whichcan be mounted rotationally lockable on the first connection componentand features at least one stop and a second part, which can be arrangednon-rotatably on the second connection component. The first part may berotatably mounted relative to the second part. The adaptable stopmechanism comprising a stop device having at least one counter-stoparranged axially between the two parts, wherein the at least onecounter-stop corresponds to the at least one stop and wherein the stopdevice is configured to define the different relative rotational anglesor rotational ranges by means of the at least one counter-stop. Theinvention also relates to a carrier system or a stand apparatus havingsuch a rotatable connection.

LIST OF REFERENCE NUMERALS

-   1, 1 a rotatable connection-   10 first connection component, in particular spindle-   11 groove-   13 anti-rotation means, in particular radial pin or groove in outer    casing surface-   20 second connection component, in particular sleeve-   20.2 inwardly pointing casing surface of the sleeve-   21 opening for first connection component-   22 ring-shaped section of the forked sleeve-   22.1 end face-   30 adaptable stop mechanism-   40 first part, in particular stop ring-   41 disc-shaped segment-   41.1 lug-   42 stop-   42.1 side surface, in particular flat stop surface-   42.2 concave or concavely curved inward inner surface-   43 form-fitting element-   43.1 convex or convexly curved outward outer surface-   45 centering means-   46 first end face, in particular sliding surface-   47 second end face-   50 second part, in particular toothed ring-   54 form-fitting contour-   54.1 individual tooth-   60 stop device, in particular adjusting ring-   60.1 outer casing surface-   60.2 inner casing surface-   61 lug-   62 counter-stop-   62.1 side surface, in particular flat stop surface-   64 form-fitting contour-   64.1 individual tooth-   66 end face, in particular sliding surface-   70 intermediate element-   74 (first) form-fitting contour-   74.1 individual groove-   75 second form-fitting contour-   75.1 individual groove-   76 first end face-   77 second end face-   80 circlip-   90 damping element-   94 form-fitting contour-   94.1 individual tooth on adjusting ring-   94.2 individual tooth on second part-   100 stand apparatus-   101 carrier system-   102 (first) carrier-   R rotational axis-   α angle between the two end faces of the intermediate element

The invention claimed is:
 1. A rotatable connection for a standapparatus to be arranged in an operating room and comprising anadaptable stop mechanism which can be arranged between a firstconnection component and a second connection component mounted rotatablyaround a rotational axis relative to the first connection component, theadaptable stop mechanism comprising: a first part which can be mountedrotationally lockable on the first connection component and features atleast one stop projecting axially from the first part; a second part,which can be arranged non-rotatably on the second connection component,the first part being rotatably mounted relative to the second part;wherein the adaptable stop mechanism comprises a stop device having atleast one counter-stop arranged axially between the two parts, the atleast one counter-stop being a projection extending radially outwardlyfrom an outer casing surface of the stop device, wherein the at leastone counter-stop corresponds to the at least one stop and wherein thestop device is configured to define different relative rotational anglesor rotational ranges by means of the at least one counter-stop.
 2. Therotatable connection according to claim 1, wherein the stop device canbe positioned on one of the first part and the second part in at leasttwo different rotational angle positions such that the stop device isnon-rotatable in relation to the one of the first part and the secondpart.
 3. The rotatable connection according to claim 1, wherein thefirst part is arranged such that it can be displaced along therotational axis in an axial direction and/or the stop device is arrangedsuch that it can be displaced along the rotational axis in the axialdirection jointly with the first part.
 4. The rotatable connectionaccording to claim 1, wherein the first part and the stop device andoptionally also the second part can be positioned axially on the secondconnection component in an axial direction.
 5. The rotatable connectionaccording to claim 1, wherein the stop device is arranged such that anon-rotatable arrangement of the stop device on the second part isensured by weight acting on the stop device.
 6. The rotatable connectionaccording to claim 1, wherein the second part has a form-fitting contourfor defining individual rotational angle positions on an inward pointingcasing surface and/or on an end face pointing in an axial direction andwherein the stop device has a corresponding form-fitting contour on anend face pointing in the axial direction to the second part.
 7. Therotatable connection according to claim 1, wherein the first part andthe stop device together form a slide bearing.
 8. The rotatableconnection according to claim 1, wherein the first part comprises asliding surface arranged on an end face pointing toward the stop device,and is configured to rotate with the sliding surface in a sliding mannerand/or that the stop device comprises a sliding surface arranged on anend face pointing toward the first part and is configured to mount thefirst part by means of the sliding surface for a sliding rotationalmovement around the rotational axis, the sliding surface of the firstpart and/or the sliding surface of the stop device being designed as afully continuous annular circular ring surface.
 9. The rotatableconnection according to claim 1, wherein the adaptable stop mechanism isconfigured to adjust a rotational area with a relative rotational anglebetween 360° and 420° .
 10. The rotatable connection according to claim1, wherein the rotatable connection comprises an intermediate elementwhich is arranged, when viewed in an axial direction, between the firstpart or between the stop device, and the second connection component andat least one form-fitting contour for connection with the stop device orthe second connection component, wherein a form- fitting contour isarranged on each of the two opposite lying end faces of the intermediateelement.
 11. The rotatable connection according to claim 1, wherein theintermediate element is designed as a ring-shaped disc, and/or theintermediate element is designed as wedge-shaped and of non-uniformaxial dimension.
 12. A carrier system for a stand apparatus to bearranged in an operating room and for positioning a medical technologydevice in the operating room comprising a rotatable connection accordingto claim 1 as well as the first connection component in a form of aspindle, and the second connection component in a form of a sleeve. 13.The carrier system according to claim 12, wherein the second connectioncomponent is designed as a forked sleeve, wherein at least the stopdevice and the second part and also the first part are arranged inbetween two ring -shaped segments of the forked sleeve, in one of thetwo ring-shaped segments, wherein the rotatable connection comprises anintermediate element which is inserted into one of the two ring -shapedsegments.
 14. An apparatus for arranging in an operating room andpositioning a medical technology device in the operating room,comprising a rotatable connection according to claim 1.